#### stefan r

Science Advisor

Gold Member

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Slightly ovoid. But I think it is fine to think of both tides and rotation as creating an oblate spheroid. A spheroid is a special case of ellipsoid where 2 axis are equal.And tides also distort spheres into ellipsoids. Correct?

My impression is that the gravity wave does not create an oblate spheroid. Starting with a perfect sphere 2 of the axes change in opposite ways. So 3 equal diameters become 3 non equal lengths.

Might be worth pointing out that tides are different from wind wave height. Something well above high water could get wet. Tidal waves and storm surges are also different.